Not done:
Not done:

> * Add hash for evaluating GROUP BY aggregates (Tom)

randomtask1155/gpdb,royc1/gpdb,arcivanov/postgres-xl,cjcjameson/gpdb,snaga/postgres-xl,Quikling/gpdb,50wu/gpdb,royc1/gpdb,chrishajas/gpdb,zeroae/postgres-xl,arcivanov/postgres-xl,rubikloud/gpdb,randomtask1155/gpdb,arcivanov/postgres-xl,yuanzhao/gpdb,rubikloud/gpdb,50wu/gpdb,ovr/postgres-xl,jmcatamney/gpdb,Chibin/gpdb,Postgres-XL/Postgres-XL,rubikloud/gpdb,zaksoup/gpdb,ovr/postgres-xl,janebeckman/gpdb,foyzur/gpdb,yuanzhao/gpdb,CraigHarris/gpdb,oberstet/postgres-xl,kmjungersen/PostgresXL,greenplum-db/gpdb,cjcjameson/gpdb,chrishajas/gpdb,0x0FFF/gpdb,Quikling/gpdb,chrishajas/gpdb,xuegang/gpdb,Quikling/gpdb,yuanzhao/gpdb,ovr/postgres-xl,xinzweb/gpdb,zaksoup/gpdb,zaksoup/gpdb,rvs/gpdb,randomtask1155/gpdb,zeroae/postgres-xl,0x0FFF/gpdb,edespino/gpdb,50wu/gpdb,chrishajas/gpdb,50wu/gpdb,foyzur/gpdb,pavanvd/postgres-xl,lpetrov-pivotal/gpdb,zeroae/postgres-xl,xuegang/gpdb,rubikloud/gpdb,postmind-net/postgres-xl,ashwinstar/gpdb,lpetrov-pivotal/gpdb,chrishajas/gpdb,0x0FFF/gpdb,tangp3/gpdb,Quikling/gpdb,cjcjameson/gpdb,ahachete/gpdb,Chibin/gpdb,kaknikhil/gpdb,Chibin/gpdb,xinzweb/gpdb,rvs/gpdb,greenplum-db/gpdb,tpostgres-projects/tPostgres,postmind-net/postgres-xl,ahachete/gpdb,ashwinstar/gpdb,lintzc/gpdb,snaga/postgres-xl,ashwinstar/gpdb,ahachete/gpdb,lisakowen/gpdb,postmind-net/postgres-xl,lisakowen/gpdb,techdragon/Postgres-XL,randomtask1155/gpdb,foyzur/gpdb,xuegang/gpdb,adam8157/gpdb,ashwinstar/gpdb,cjcjameson/gpdb,royc1/gpdb,janebeckman/gpdb,zaksoup/gpdb,CraigHarris/gpdb,yazun/postgres-xl,lpetrov-pivotal/gpdb,atris/gpdb,tpostgres-projects/tPostgres,edespino/gpdb,randomtask1155/gpdb,edespino/gpdb,kaknikhil/gpdb,janebeckman/gpdb,xuegang/gpdb,50wu/gpdb,xinzweb/gpdb,lintzc/gpdb,zeroae/postgres-xl,cjcjameson/gpdb,tangp3/gpdb,atris/gpdb,0x0FFF/gpdb,zaksoup/gpdb,cjcjameson/gpdb,adam8157/gpdb,tpostgres-projects/tPostgres,yazun/postgres-xl,tangp3/gpdb,xinzweb/gpdb,lintzc/gpdb,ahachete/gpdb,pavanvd/postgres-xl,ashwinstar/gpdb,greenplum-db/gpdb,techdragon/Postgres-XL,janebeckman/gpdb,kaknikhil/gpdb,CraigHarris/gpdb,edespino/gpdb,arcivanov/postgres-xl,pavanvd/postgres-xl,edespino/gpdb,lintzc/gpdb,yazun/postgres-xl,rvs/gpdb,kaknikhil/gpdb,randomtask1155/gpdb,lpetrov-pivotal/gpdb,greenplum-db/gpdb,CraigHarris/gpdb,oberstet/postgres-xl,atris/gpdb,atris/gpdb,rvs/gpdb,chrishajas/gpdb,oberstet/postgres-xl,rvs/gpdb,janebeckman/gpdb,0x0FFF/gpdb,snaga/postgres-xl,greenplum-db/gpdb,yuanzhao/gpdb,royc1/gpdb,rvs/gpdb,Chibin/gpdb,xinzweb/gpdb,Quikling/gpdb,xuegang/gpdb,adam8157/gpdb,CraigHarris/gpdb,yuanzhao/gpdb,ashwinstar/gpdb,janebeckman/gpdb,tangp3/gpdb,jmcatamney/gpdb,techdragon/Postgres-XL,edespino/gpdb,0x0FFF/gpdb,rubikloud/gpdb,cjcjameson/gpdb,randomtask1155/gpdb,cjcjameson/gpdb,greenplum-db/gpdb,lisakowen/gpdb,Chibin/gpdb,Postgres-XL/Postgres-XL,zeroae/postgres-xl,foyzur/gpdb,lintzc/gpdb,tangp3/gpdb,ashwinstar/gpdb,ahachete/gpdb,edespino/gpdb,CraigHarris/gpdb,kmjungersen/PostgresXL,Chibin/gpdb,lpetrov-pivotal/gpdb,0x0FFF/gpdb,tangp3/gpdb,rvs/gpdb,yazun/postgres-xl,royc1/gpdb,yuanzhao/gpdb,greenplum-db/gpdb,randomtask1155/gpdb,edespino/gpdb,rubikloud/gpdb,yazun/postgres-xl,jmcatamney/gpdb,xuegang/gpdb,jmcatamney/gpdb,Chibin/gpdb,rubikloud/gpdb,Chibin/gpdb,lintzc/gpdb,royc1/gpdb,rubikloud/gpdb,Postgres-XL/Postgres-XL,atris/gpdb,oberstet/postgres-xl,lintzc/gpdb,pavanvd/postgres-xl,adam8157/gpdb,CraigHarris/gpdb,janebeckman/gpdb,lisakowen/gpdb,lpetrov-pivotal/gpdb,snaga/postgres-xl,Quikling/gpdb,greenplum-db/gpdb,edespino/gpdb,Chibin/gpdb,kaknikhil/gpdb,royc1/gpdb,foyzur/gpdb,zaksoup/gpdb,ashwinstar/gpdb,rvs/gpdb,ovr/postgres-xl,jmcatamney/gpdb,techdragon/Postgres-XL,CraigHarris/gpdb,xuegang/gpdb,arcivanov/postgres-xl,xuegang/gpdb,lisakowen/gpdb,jmcatamney/gpdb,ovr/postgres-xl,lisakowen/gpdb,tangp3/gpdb,cjcjameson/gpdb,tpostgres-projects/tPostgres,ahachete/gpdb,pavanvd/postgres-xl,yuanzhao/gpdb,kmjungersen/PostgresXL,adam8157/gpdb,lisakowen/gpdb,ahachete/gpdb,kaknikhil/gpdb,Quikling/gpdb,yuanzhao/gpdb,50wu/gpdb,tpostgres-projects/tPostgres,yuanzhao/gpdb,lpetrov-pivotal/gpdb,lintzc/gpdb,arcivanov/postgres-xl,foyzur/gpdb,lpetrov-pivotal/gpdb,atris/gpdb,xuegang/gpdb,yuanzhao/gpdb,adam8157/gpdb,kmjungersen/PostgresXL,jmcatamney/gpdb,xinzweb/gpdb,zaksoup/gpdb,techdragon/Postgres-XL,foyzur/gpdb,xinzweb/gpdb,CraigHarris/gpdb,rvs/gpdb,Postgres-XL/Postgres-XL,janebeckman/gpdb,janebeckman/gpdb,oberstet/postgres-xl,foyzur/gpdb,kaknikhil/gpdb,50wu/gpdb,Postgres-XL/Postgres-XL,edespino/gpdb,cjcjameson/gpdb,adam8157/gpdb,postmind-net/postgres-xl,jmcatamney/gpdb,lisakowen/gpdb,postmind-net/postgres-xl,Chibin/gpdb,kmjungersen/PostgresXL,snaga/postgres-xl,Quikling/gpdb,kaknikhil/gpdb,janebeckman/gpdb,ahachete/gpdb,atris/gpdb,tangp3/gpdb,chrishajas/gpdb,atris/gpdb,lintzc/gpdb,chrishajas/gpdb,royc1/gpdb,adam8157/gpdb,kaknikhil/gpdb,50wu/gpdb,rvs/gpdb,kaknikhil/gpdb,Quikling/gpdb,zaksoup/gpdb,xinzweb/gpdb,Quikling/gpdb,0x0FFF/gpdb